Abo Study 1

Question 0

A trifocals power is what percentage of the add

Answer 0

50%

Question 1

On a script if there is a value under the cylinder portion it means the patient has

Answer 1

Astigmatism

Question 2

The axis on a script coincides with. A. Sphere or b. cylinder

Answer 2

Sphere

Question 3

When a person can see an object at 20feet that a normally sighted person can also see at 20feet they have

Answer 3

20/20 vision

Question 4

Chart used to measure visual acuity is the

Answer 4

Snellen chart

Question 5

If a person can see an object at twenty feet that a normally sighted person can see at forty feet they have

Answer 5

20/40 vision

Question 6

A concave lens will refocus light on the retina for a myopic or hyperoptic eye

Answer 6

Myopic

Question 7

A convex lens will focus light rays on the retina for a myopic or hyperoptic eye

Answer 7

Hyperoptic

Question 8

-3.50 -1.00 x 180 is an example of what type of astigmatism

Answer 8

Compound myopic

Question 9

.50 -1.00 x 180 is what type of astigmatism

Answer 9

Mixed

Question 10

+2.50 -1.00 x 180 is an example of what type of astigmatism

Answer 10

Compound hyperoptic

Question 11

How many inches does a meter equal

Answer 11

39.37

Question 12

How many millimeters in 3 meters

Answer 12

3000

Question 13

Convert 8millimeters to meters

Answer 13

.008 meters

Question 14

Convert 3 centimeters to millimeters

Answer 14

30

Question 15

How many centimeters in 6 millimeters

Answer 15

.6

Question 17

The speed of of light in air is

Answer 17

186,000 miles per second

Question 18

When the speed of light is deviated in the course of passing from one transparent to another it is known as

Answer 18

Refraction

Question 19

What theory describes light as traveling through space in minute bursts of energy

Answer 19

Corpuscular

Question 20

The focal length of a +1.00 diopter lens is

Answer 20

.05 diopters

Question 21

If a converging lens has a focal length of +2 meters, it’s power is

Answer 21

+.50 diopters

Question 22

Visible light is part of the overall spectrum of radiant energy. Although the range of wavelengths of which are perceived as visible light can vary with the individual, it is generally understood to lie between

Answer 22

390 to 750 nanometers

Question 23

If a prism can displace an image one centimeter at a distance of one meter, it is said to have a power of

Answer 23

1 prism diopter

Question 24

The distance between the crests of two waves is called

Answer 24

Wavelength

Question 25

The focal length of a -5.00 diopter lens is

Answer 25

-20 cm

Question 26

Decentering a plus lens upward will result in a

Answer 26

Base up prism

Question 27

Prentice’s rule states that the amount of induced prism is equal to

Answer 27

Power of the lens times the decent ration in meters divided by 10

Question 43

The index of refraction can be determined by what formula

Answer 43

The speed of light divided by the speed of light in the material